电解温度对含钛废渣熔盐电脱氧法制备钛铁合金的影响

Influence of Electrolysis Temperature on the Preparation of Ferro-Titanium Alloy by Electro-Deoxidation of Slag Containing Titanium

为考察电解温度对电脱氧效果的影响,以含钛废渣和Fe 2O 3混合物为阴极,碳棒为阳极,在CaCl 2电解质中,采用熔盐电脱氧法制备钛铁合金。结果表明:温度对产物形貌影响显著,产物粒度尺寸与温度呈正相关,随着电解温度的升高,产物氧含量先降低,随后升高;温度升高降低反应活化能,有利于中间产物的分解,加快反应进程;但较高温度会降低阴极电化学活性,限制氧离子的脱除。电解电流分为3个阶段,随着电解温度的升高,第二阶段开始时间向左偏移。为得到颗粒尺寸均匀、纯度较高的钛铁合金粉末,电解温度不宜过高,900℃的电解温度较为合适。同时,降低温度有利于降低电解能耗,减少背景电流。

In order to investigate the effect of electrolysis temperature on electrolytic deoxidation,Ti-Fe alloy was prepared by electro-deoxidation of molten salt in CaCl 2 electrolyte with Ti-containing waste residue and Fe 2O 3 mixture as cathode and carbon rod as anode.The results show that the temperature has a significant effect on the morphology of the product,and the particle size of the product is positively correlated with the temperature.With the increase of the electrolytic temperature,the oxygen content of the product decreases first and then increases.The increase of temperature reduces the activation energy of the reaction,which is beneficial to the decomposition of intermediate products and speeds up the reaction process.However,the higher temperature will reduce the electrochemical activity of the cathode and limit the removal of oxygen ions.Electrolysis current is divided into three stages.With the increase of the temperature of electrolysis,the beginning time of the second stage shifts to the left.In order to obtain uniform particle size and high purity ferrotitanium powder,the electrolytic temperature should not be too high,and 900℃is more suitable.At the same time,lowering the temperature is beneficial to reduce the energy consumption of electrolysis and the background current.